{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["cell type", "protein", "DNA", "cell line"], "input": "Even so, medullary thymocytes remain at least partially susceptible to negative selection even as they continue to mature ."}
{"cell type": ["medullary thymocytes"], "protein": [], "DNA": [], "cell line": []}